/**
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.guicerecipes.support;

import java.util.*;

import com.google.common.collect.*;

/**
 * A Composite implementation of {@link Closer}
 * 
 * @version $Revision: 1.1 $
 * @author james.strachan@gmail.com (James Strachan)
 */
public class CompositeCloser implements Closer {
	private final Iterable<Closer> closers;

	/**
	 * Returns a {@link Closer} for the given lists of closer strategies or returning null if the collection is empty
	 */
	public static Closer newInstance(Collection<Closer> closers) {
		if (closers.isEmpty()) {
			return null;
		}
		if (closers.size() == 1) {
			return Iterables.getOnlyElement(closers);
		}
		return new CompositeCloser(closers);
	}

	public CompositeCloser(Iterable<Closer> closers) {
		this.closers = closers;
	}

	public void close(Object object) throws Throwable {
		for (Closer closer : closers) {
			closer.close(object);
		}
	}
}
